Compressed-air cistern.



mgm

W. CLARK.

COMPRESSED AIR CISTERN.

APPLlcArnoN FILED SEPT. 1` 1914.

Patented Nov; 30, i915.

WILBUR T. CLARK, OF ASHTABULA, OHIO.

COMPRESSED-AIR CISTERN.

Specification of Letters Patent,

Patenten Nov.' so, isis.

Application filed September 1, 1914. Serial No. 859,699.

-citizen of the UnitedStates, residing at Ashtabula, in the county of Ashtabula and State of Chio, have invented certain new and useful Improvements in Compressed- Air Cisterns; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains t o make and use the same.

This invention relates to compressed air cisterns and in particular to the construction of the wall of the cistern, the object being to produce a device of this character, strong and economical in construction, and automatic in operation.

lVith this object in View the invention consists in the improved construction, ar

rangement and combination of the parts of a cistern which will be hereinafter fully described and afterward specifically claimed.

In the accompanying drawings, which illustrate an approved embodiment of my invention, similar reference characters are applied to the'same parts throughout the figures. p

In the drawings, Figure 1 is a diagrammatic elevation showing the inventionv in operation. Fig. 2, a vertical sectional view including the cistern and the pipes leading thereto and therefrom, and Fig. 3, a sectionalv view on the plane indicated by the broken line 3-3 of Fig. 2. Fig. 4, an enlarged sectional view of a small portion of the wall of the cistern, and Fig. 5, a detail view showing an approved form of expanded metal lathing used in my structure. In Figs. 2 and 3, the various layers of the wall structure are only indicated sectionally leaving the details of construction to be vshown in Figs 4 and 5.

In vthe drawings, 1 indicates a submerged chamber formed of any suitable material,

`lout preferably of cement, havin a manhole 2 and in which are located the pipes leading to and from the cistern, comprising the supply pipe 3, the exhaust pipe 4 and an air feed pipe 5. Suitable valves are formed in the supply pipe 3, such as a check valve 6, safety valve 7 and cut-oli valve.8 adapted to check back flow of water or cut ol' the supply of water from the cistern or to give vent to the water in case of undue pressure. Such valves, if desire'dpI can likewise be formed in the outlet pipe, and in fact, a cutoff valve 9 is formed in the outlet pipe. The air feed pipe 5, likewise has a cut-olf valve 10 to cut off the supply of air to the cistern.'

The cistern 1l slightly projects into the chamber 1, the pipes 3, 4 and 5 penetrating the cistern in the projecting part.l A manhole 12 is formed in this end of the cistern, having a suitable cover 13 and so positioned that the cistern can vreadily be cleansed. The cistern 11, is constructed as follows A cylindrical metallic structure is used, of suitable formation, but preferably of expanded lathing material 14 as shown in detail in Fig. 5 having the ends closed to form the closed end portions 15. Cement 16 is then plastered upon the outer surface of the metallic body 14, a portion of the cement penetrating the interstices 17 in the expanded metal body 14 to form a rough interior face to which an interior coating 18 is plastered. The interior surface is then given a waterproof coating 19 of paint of any suitable composition, but preferably of white lead mixed with glycerin and turpentine. The outer surface of the cement is coated with a composition 20 of asphalt gum and cement, forming a strong durable and waterproof coating on the outside of the cistern.f As a further reinforcement, a metallic wire mesh fabric 21 is embedded in the composition 20. A similar wire mesh fabric 2; may also be built into the body of the cementstructure as a further means of reinforcement. AS readily apparent, a cistern so constructed is exceedingly strong and durable. Suitable burs or nuts 23 are embedded in the cement body just outside l of the metallic structure 14, through which the pipes 3, 4 and 5 are threaded in such manner that the ends of the pipes will be Hush with the inner coat 19 of the cistern. The manhole 12 has a collar 24 having an exterior Harige 25 thereuponseated against 100 the outer surface of the cement structure,

'said collar 24 ending Hush withl the inner the inner face of the collar 24 and forming 110 pipe 3 until the cistern is filled approximately. as shown in Fig. 2, at 30, air being retainedl in the eisternby closing valve 10. The Water and air being underA pressure,

-when the surface valve 31 in the exhaust pipe 4 is opened', the water will'be forced through a Vsuitable pipe through the house' as diagrammatically indicated at 32 in Fig.

1, or the Water may be used to extinguish Afire in the house, or for other usual purposes.

Whilel I have shown la-speciic form .of

expanded metal lathing 14, I may substitute therefor any of the Well known forms thereof, Without departing from the spirit and scope of the invention.

As I have now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

layer of cement plastered on said metallic body structure and sealed against the cement which has projected through said interstices, a water-proof coat covering said interior cement coat, a water-proof -body over the exterior cement, and reinforcing means inthe outer water-proof body of said structure.

In testimony whereof I have signed my name to this speciiication in the presence of two subscribing Witnesses.

' WILBUR T. CLARK.

Witnesses:

CLAIRE A. WALTER, JOHN L. DWYER. 

